A fictional drink consisting of milk and a psychoactive drug. From the book and movie "A Clockwork Orange".
Three drinks were available:
Moloko plus Vellocet
Moloko plus Synthemesc
Moloko plus Drencrom
The milkbar sold moloko plus vellocet or synthemesc or drencrom... This would sharpen you up and make you ready for a bit of the old ultra-violence.